Stylus Pen Magnetic Field Blocking for Stable Resonance
Solution Overview
Problem
Existing stylus pens experience decreased touch sensitivity and accuracy due to changes in resonance frequency and signal intensity caused by approaching and tilting motions, leading to user discomfort and reduced sales volume.
Innovation Solution
Incorporation of a magnetic field blocking unit within the stylus pen, utilizing various configurations of magnetic materials to shield the resonance circuit from external electromagnetic interference, maintaining consistent resonance frequency and signal intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stylus pen is used in hover state or tilting motion, then the user can perform precise input operations, but the resonance frequency and signal intensity change causing decreased touch sensitivity
Solution Approach 1:
A magnetic field blocking unit is introduced as an intermediary component between the resonance circuit and the external magnetic field environment. This unit selectively blocks external magnetic field interference while allowing the resonance circuit to function normally, thereby maintaining touch sensitivity during hover and tilting operations without affecting user operability
Solution Approach 2:
The patent converts the harmful effect of external magnetic field interference into a beneficial solution by using magnetic field blocking materials. These materials, which would normally be seen as adding complexity, actually improve touch sensitivity by eliminating the root cause of signal instability during precise input operations
2Adaptability or versatility
If the resonance circuit is exposed to external magnetic field, then the stylus pen can interact with the touch sensor, but the resonance frequency and signal intensity become unstable
Solution Approach 1:
The magnetic field blocking unit serves as a protective intermediary that filters external magnetic field interference while permitting necessary electromagnetic interactions between the stylus pen and touch sensor. This maintains resonance frequency stability without compromising the ability to perform precise input operations
Solution Approach 2:
The magnetic field blocking materials are strategically positioned in specific regions where external interference most affects the resonance circuit. By applying blocking properties locally rather than uniformly throughout the entire stylus pen, the design maintains touch sensor interaction capability while stabilizing resonance frequency in critical areas
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances touch point estimation accuracy and maintains signal intensity, reducing the influence of approaching and tilting motions, thereby improving user experience and stylus pen performance.
Implementation Method 1
a resonance circuit unit accommodated in an internal space of the housing, including an inductor unit and a capacitor unit electrically connected to the inductor unit, and configured to resonate in response to a magnetic signal generated by a touch screen
Implementation Method 2
the touch sensor may receive a second electromagnetic signal generated by the resonance of the resonant circuit from the stylus pen
Implementation Method 3
a magnetic field blocking unit surrounding at least a partial portion of the resonance circuit unit, and including a magnetic material
Data Source
AI summary
The present disclosure relates to a stylus pen. The stylus pen according to the present disclosure includes: a housing; a resonance circuit unit accommodated in an internal space of the housing, including an inductor unit and a capacitor unit electrically connected to the inductor unit, and configured to resonate in response to a magnetic signal generated by a touch screen; and a magnetic field blocking unit surrounding at least a partial portion of the resonance circuit unit, and including a magnetic material.